Khan Academy Resources

Math Topics

Everyday we see percentages. A store advertises a sale of 30% off. We would like to leave our server at a restaurant an 18% tip. We read that the unemployment rate has increased by 18% over the last year. The study of percents allows us to tackle these types of problems.

Have you ever measured your living room in feet and found out that the carpet you want to purchase is priced by the square yard? What if you are traveling to Helsinki and the weather forecast is in degrees Celsius? By using the concepts of unit conversion we can answer these types of questions.